Apparatus for administering anesthetics.



A G. www. y APPARATUS FOR ADMINSTERING ANESTHETICS.

.APPllCATlCN ULEB JUNE i0. 1915.

uw lie novel :(feaimies wing pointed omI pniiiio he mix'ng ohimibei oi' the :ippern'tua JG AFPRATUS i Specification of Leiters Patent i .i i in 9 Application filed Jimi@ lh, 5. ffeire Sie, lf3-,329'.

i??? wfaom me?! owwesm; T i'eseiiiis a section. on the line Be it li?" that l, DAVID Liiiiiii'ia eiui .lfipiovements iii Y fr: which applicable either in pui-t .ll stlietice, o' which the iii whole t zippzimus geneully 'for :ul- 1 o spe@ {icatiom f ioinisiei'ing ahef-iihe'fbhfs and foy similar pur .m3 invention ifelatesio impioveposee. The Sei/emi improvements are iii the i A me for in administering' instance shown in combination to 6 v i um the primailg" objects of the provide en eppzunue which makers it possiii we vio provide eompeot, poi'tziloie Eo ediiiimsei', in a, pi'fioiiwl way, fecieon ,fllecl "ppeiitis Capable tie dosages of zuiesbhetics. it is w he uw s. euch scope 01 the claims.

ooiieci. iiiezisuiemen-L i in. the construction show/'11, the apparatus l@ of ilow of: lhe from iniriiiilmu Lo imixi .is preferably mounted on a suitaol Stamlm'nl aiiy and directly indicated l wliieh maplin provided mi its lower eiiil eilehiing the a (limi, 'to with il basi, uml the standard oi column l i f Mailly and with precision supporte u, suitable inhiber o' io dosage of anesthetice; to pio- 'which 'lull/,taiilis, (stored with the suitable A pzwfus which 'will he capable imeetheic and the oxygen, respectively, 8G

lof use in e lmiiiisreiing either niii'ous oido'` under high pressure, are connected.. For

ozigeig ely-lier5 propeiiy wipoi-ized exzuiiplo.; the fitting 2 may ieceive ii tank eiiei les olie use of nitrous iii elmz'geil with 'nitrous oXid under piessuio,

"i :it high piessures witxieirb anni the iting 3 may receive :i will; charged vL ieili'feing 'valves ivi-h oxygen nuclei pressure. Means is pi'o- 5 e Veoiion, vided for heatingthe nliious oifiql @as io if o'lioi enfls, the in oowfii improvements, :and co avoid refrigeration o1" undue Cooling; thereof i L "l iilgeiiients of Parisi, fill as consequent upon its expansion oi' reduction militer more fully described, in pressure it passes from its storage *muli v y lie claims et the eiicl of the specifie shown, this; nitrous @xiii passes through fioriion the pipe i into i heaer, which pieiioinhly i-e iieooinpanyiiig drs/Wuigzof the tvp@ embodying a plpe coil through n .Figure l is; iront elevation of im mies which the iiiaious @mil passes :mi-l mi elecineometer aons'iuotecl in accorgiamo with tmcnl heziimg coil or wie 5 :ma l he J5 ih@ piesen invention; tween a, pair oi- (lisks 5 und, eoneinee h- Fig; 2 repiesenie si horizontal Section on in the pipo coil, whei'eby the msous l is lie lille -2 @if l; heated oleoi'ically, lie outlet (l of ihn .healer Fig. 3 iepi'eseiiils a vertical section Leiten A ooiulucmg the nitrous oxlll gus lio n reguca'bing part of 'the apparatus; embly of the micrometer screw type, iis

- i5 detail sectional View shwyng sho\vi1,in r11-Llei: lm'b ii'z may he mljuege/l with lewe" poit'n of one of the measuring Suilicient :wem-i ey ifo reduce the piesslzie oi" --eincl inclieeiiiig units; the nim-ous @xiii '63o the desired point :mil to Fig. 5 represents a horizontal transverse iiwiiiniu i1; at auch i'fl,| ice i mossme. lhe 3-05 seciimi iliiouli the iiieaieuiing und incliosi'tox en from the stoom@ iuhli oolmeciefl "n v heater amil lieoili'ous which valve ififilso preferably ol" the liiieiomcentrally through ille measuring und iiiilloting or eeniiolliiig valve l ifhioo is fixii N0' the. oxygen stored at high pressure tc be delivered at the desired low pressure to the apparatus and to be maintained at such low pressure; I

The present invention provides means whereby the rate of' flow ot' the nitrous oxid v'and the oxygen at any given moment may be determined quickly and accurately. As shown, the nitrous cxid and oxygen at rcduced pressure.,` are conducted by the pipes l0 and l1 to u measuring and indicating in struinent 12 which serves to measure the rates of .tlow oi. these fluids :nd to indicate such rates oi' dow. Preferably, the indicator comprises a glass or other transparent ease 13 which has o top 14k fitted tim'. tly on A'the upper end thereof, and the lower end oi' the case has a fluid-tight :it with a base l5, The glass casecontuins a. pair of measuring; and indicating instruments, one ol these iustruments, the instrument 16, serving` to measure and indicate the rate of flou' ot the nitrous oxid, and the other instrumeiuv li' serving to measure and indicate the rate of ioW of thc oxygen.. These instrlnnents in the present instance are duplicates, consist ing of a. pair of tubes 18 and 1.9 which are connected at their lower ends to the introns oXid and oXVge-n supply pipes l0 and ll, rcspectively. l`he tube 18 is formed in one wall with a longitudinally extending; slot 20, andthe tube il) is formed with u similar slot- Ql', and a pair of indicatm' members 2Q and 23 are contained in the tubes, pointers Q-land being attached to the r as; active indicator members and coperatingwi appropriately graduated scales 2G and 2i', respectively. r.lhc indicator inemliicrs and i223 (it closely Within the respective tubos but are free to reciprocate therein under the pressure exert-l ed beneetb. them by the nitrous otiid and oxygen, respectively, these indicator lueur bers actingrsomewhat as floats or pistons. These indicator members ,22 and 23 have a tendency, by 'reason of their weight, to assume positions, at the bottoms of their respective tubes, but they will be lifted by the pressure of either the nitrous oxid or the oxygen ontving' the bottoms of the respective tubes, the nitrous orid or oxygen escaping from the respective tubes through. those portions olI the slots 2i and ill which ere uncovered by and are beneath the indicator members 2Q and 0% the ris-` )gr or felling; of either of these irnlicator members obviously providing ari outletoiE increased or diminished capacity through which the nitrous oxid or theloxygen, as the case .muy be, escapes from the resiliective tube und into the chamber inclosed by the easing 13. These indicator members are therefore capable of providing passa ges tor 'the ni trous oxid and oxygen, respectively. which tary in accordance with `varia tions in the reti-o ot flow ot iiuids, the rute of flow ci. either 'fluid determining the height or Vertical post tion that the respective indicator member will occupy in its tube. The pointers connected to 'these indicator members indicate directly the rates oi flow of the respective fluids according to the different positions occupied by the respective indicator members 'which are subjected to the inliuence of the flowing iiuids and are positioned autoinatt cally .in accordance with the rates of flow of such fluids.

The nitrous'oxid and the oxygen, as stated, discharge into the chamber inclosed by 'the ci sing lthrough those portions ot the slots E20 and 2l of the tubes which are ben )ath and are uncovered by the indicator members and 23. F rom this chamber, these fluids pass through a conduit 28 into a mixing chamber :29 where they are coinining'led to form a nanesthetic medium, the constituents of which are in the desired proportion, and the anesthetic medium is then in condition to be administered to the patient. As shot4 ,1, the anesthetic medium will discharge from. the 'lining chamber 29 through an outlet 30, and it is preterable to fit into this outlet an instrument 3l to indicate the rate of liow of the anesthetic as the saine passes on its Way tothe patient. Preferably, this instrument 31 is similar in its construction and inode of operation to one of the instruments for .measuring either the rate of flow of the nitrous oxid or the oxygen, it being shown as comprising u tube 32, the lower end of which connected to the outlet 30, and the tube is inclosed in a glass or transparent casing the fluid which discharges from 'the tube through the slot 34: therein passing from the chamber inclosed by the casing 33 to an outlet 35, the latter being connected by a tube to a mask or other appliance suitable use in administering' the anesthetic to the patientin the mode desired The tube contains :in indicator member similar lto the lioat or piston. described inconnection with the instruments for measuring the rate of iiow of the nitrous oxid und oxygen, the pointer 36 connected to 'the indicator nieinber coperating with appropriately cali-- breted or graduated scale 3i'.

different measuring instruments are preferably calibrated to indicate the rates of flow of 'the different fluids in liters per minute. lil'liere ether alone is used, the measuring instrument on the discharge or outlet ot' the apparatus shows the rate ot flow of this ether Vapor. l/Vhere a. Inieture ol nitrous oxid and oxygen is applied, the measuring instrument on the outlet of the apparatus indicates the .rate of flow of such mixture. Where oxygen alonois supplied, the measuring instrument on the outlet oit the apparatus shows the rate of flow thereof.

ln some instances, it is desirable or necessary to administer ether vapor es un anes- 'llie scales for iiiie liqiiiil eigliiii' i'eiiiiiiibs lie i is :siipiilieil by :i lieziei' iiliieli.,

in die "'es'eiit iiisimiiev, is contained witliiri the eliiiiiiliei 29, it eei'iipz'isiiig :i liel low ingm m' swell l ilie meer emi of iifliicli eleseil. :iiiil olie ciiiiei' @uil of which is einen te i'eeeive :i limiting device, preferably ziii, infsiiclescent electric lamp Afll. This l1iilliii.' eisingr er shell le? is pesiieiied imme- (limi liy' 'lieleiv the sigli/ 'feed 40, the liqilil ether dropping' tlieieeii, :ind :is the hollow @using 0i" shell iS lieziteil, Llie viipeiizzitioii iii' lie either will be gi'ezily facilitated. The viipoi'lzefl. efiei' pas. from the mixing cliim'iliei' hi'eiigli the oiilet 30, thence tlii'eiigli alie .iiieiisi ring liislii'iimeiii; te .'ilie leziililigg' 10 the imiz'lent. 'In oi'ilei? to pri i, iiiliez'iiiiiiiioi'l iii' viii'inlien in the leii: 0

tir

li'oiii lli'e i'iiixii'iig ehifiiiil'iei? 2', :ind is pio- 'i'ideil i lili :i valve lf3 iifliieli may lie eloseil when the? is not lieliig adminis'teefl. Dui "fiisii'iit'ieii if ether, however., Open :ii'iil iii' or 'mpo' muy :ply tank 'from the mixing L. eiiteiflie eibliei' A chamber i'epliiee ille liquid etlfiei: ilis elle li ei'efifom 'The iiiwsieiii', iii Lien, pmi: :iii iippziiraiiis; ei' liulniiziisieriig zilfiisblielcii which is Ceiifiiieig, pei'iiiile, yiiiiil easily li: iiilleil.j Anil wliieli is .eapgilile mf; being iissecl i'i'itli fii ilitlir 1* fiiiesilieties iii scientifiifie met nim mit of 'Ll iiiiil exygg; i, fiieni; being; infliit fill. times :is Well.

am fillimie ii'liiitli 3% being' iiiliiiiii depending i. lie :fi-jy'iii'pvzi'tieiii'; iiiiilei'Y i'iie influence if Fiii'diei'iimi'e. tlie'sippii iitiis eiiiilileb' ilie iie of; 'nitrous exiil. zi :il oxygen ii'iili liiglil)7 elizii'ggeii iiiilmA 0i' wiiliiiiit lie insti'ilii'ieiii fer iiieiisiiiiiigi lie rates el! lle'ii of the eoetitiieiits el' die iiiiiiiii'e eiiiilile :i mix iu'e "ce be iisefl containing' (.z'mistiiieiiibs el. any desired pi'epoi'timi.. Yliiii'liliei'iiioi'ej slieiilil it become neeesvii'y, iliii'irig the ii li'iiiiiistffiigieii @il ai mixture of iiiti'eiis; Oxicl :iiiiil oxygen, te revive the pzit'iei'ii",7 suoli, 'fel' sis miii ieeiii' falioiilil ilie piiigieiit 0i.' s); 'iuiiiiis-J ef collapse in" the i ilieigifs., lli siip fl een :ie iiiiirieilmiiely eiilf.

Vy i'iiii'e l' :iiiil then oxygen e iiilii'iiiieiiiition iiici. eiiiiiiiiiieil iii te receive it. fi

" ii ie iii'm'eiis; Oxill :im jgen iiiifiliire, :mil is seeu'feel 'the iise el the 'ref-5p ive heaters ii'liieli pi'even' iiiidiiie i'eliz'igei'aie il- 0i' cooling liefeof, diie to expansion ei? vapei'izzitiom the pi'eieiit "inveiiitcfii being" epeeially adapted te the use of electric liesiers which we capiilile el: easy i'egulfitimi o suit eendilons.

2. Apparatus :501' :i ziiieetliet- 10S eeiipi'ising mlm i] me; 'iis for ii'ze ef me :,iiiesiiiietie e e'gii'iriiinve Upeii one lie eneshetie fis the supplying the minsigtii tliei'ee, he. dei'ie el the eenstitiieiiivs (il lnttei: leiiisi im simil ,ifi .mg eliiiiiibei'. the seiii'ee el supply elf sind latter Constituent being' 'li'i'ee from :ne iiiiliience ef said iep' devies, amil E iji'esfiiiie i'eliieii'igg iiieiiiis ai; lie millet elit be limiting device.

il. Air,A 'n.iiis lim' iiilii 'ing ics Comprising' :i mixv 'l' eeiitziiii si. seixi'ee e? u ii.. l'ieiiiiig (levi fictive iiii :i i'iestli iet-- ii iii.i y iiffwisl'lieiiie the latte i'liiii'r. ""m'n i1' :iiiii'e': el: supply' ite iig. Said Iiiiliziiiii; chmul/mi'. mail. pi'essiiife eiiiitrolling :imi mili' 'yep 'valve ieezineifl ijf-,jii'eeii i.ef Viiil 'iig (lei/lee mi@ i ruimer.

eliiiiiiliei' .fiiliipizei 30 flellief :in .fiiiiistl'ietie to the pziixiiit, means for supplying' eiliiii' :if tii'ii ililieieiit liinils of :mesizlietii'e te Siiiil cliiiiiiliei'., iiieiiiis; lier individu-- 'y el eii'liei' Gli les cmifiprir'ng iz filly i'eg'iil:itiiiir tlii: siiiiiiil Sziiil 25 siiivtlieties, ini-fins: m iiiiliizz'iiiiiip; lie iiii'e el .flew iii eiieli mill une: zlieizies to sziiil. i-liiiiiiliei', iiiiil, menus iiii' iziilii, Ling ilii lie i'iii'e elf flow nl: :i liizie from ist 5. Apparatus for administering anesthetics comprising a chamber adapted to deliver an anesthetic to the patient, means for suppiying either of tWo diierent kinds @f anesthetics to said chamber, means for individually regulating the rates of iiow of said anesthetics to said chambenmeans for indicat` ing the rate of flow of each of said anesthetics, and means at the outlet of said chamber operative by the How of uid for measuring and `.indicating the rate of How ofthe anesthetics which are bein@ supplied.

6. Apparatus for administering anesthetics comprising a chamber, means for supp1ying constituents of an anesthetic to said chamber to mix therein, and instruments contained Within said chamber for measuring and indicating the rates of flow of the respective constituents.

7. Apparatus for administering anesthetv ics comprising a chamber, and instruments therein for receiving and measuring and indicating the rates of How of the constituents of an anesthetic and discharging such constituents into said chamber to mix therein. In testimony whereof I have .hereunto set my hand in presence of twosubscribing Wit- Witnesses CARL Karolien? Louis BURO. 

